TECHNOLOGY NEWS -

 

USING YOUR CELL PHONE TO SEE THROUGH WALLS

 

New WiVi app built-in to your cell phone would let you see behind walls - this is truly the end of privacy

 

MIT professor Dina Katabi and graduate student Fadel Adib have announced Wi­Vi, a demonstration of a technology that uses Wi­Fi to allow a viewer to "see" a person moving behind a wall. (Wi­Vi stands for "Wi­Fi" and "vision.")

 

The trick is canceling out all interfering signals – Wi-Fi doesn't just bounce off humans, but also walls, floors, and furniture. And those signals are 10,000 to 100,000 times more powerful than the reflections off a human body. 

 

Katabi's wi­vi sends out two wireless signals, one of which is the inverse of the other. In what Katabi calls "interference nulling," the two signals cancel each other out unless they hit a moving target – such as a human.  "To silence the noise, we change the structure of the Wi-Fi signal so all the undesired reflections cancel," she said.

 

The device is meant to be portable so, for example, a person worried that someone was hiding in the bushes could do a quick scan for her personal safety.

 

Read more:  http://www.livescience.com/37837-researchers-see-through-walls-with-wi-vi.html
More on WiVi - http://www.pcmag.com/article2/0,2817,2421218,00.asp

Related:
Wi-See detects your gestures using WiFi  -     http://www.technewsdaily.com/18262-gesture-detection-system-uses-wifi.html